Polish-rod guide



R. BRANNON POLISH ROD GUIDE Filed June 14, 1926 bwentor 7 w bard :Brarz/mw,

Attorney Patented Get. 5, 1926.

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tin-ran ST n'roiiAnn BRANNON, or BRECKENRIDGE, TEXAS.

POLISH-ROD GUIDE.

Application filed June 14, 1926. Serial No. 115,890.

This invention relates to an improved appliance for use in connection with oil well pumping equipment and it has more specific reference to what may be conveniently referred to as a polish rod guide.

My principal aim is to provide a device of this class which is associated with a walking beam and supporting standard therefor to serve as an oscillatory carrier for the grip line, the carrier being so mounted as to remain in a vertical position under all conditions, to insure a truly vertical movement of the polish rod through the stul'iing box in orderto prevent wear on the parts and to insure more efficient operation.

The structural details serving to provide for the advantages will become apparent from the following description and drawings.

In the drawings V Figure 1 is a fragmentary side view of a part of a pump jack showing the improved appliance associated therewith.

Fig. 2 is also a view like Fig. 1, showing the walking beam in a position for raising the polish rod.

3 is a detail view of the carrier itself.

Referring to the drawings in detail, the reference character 1 designates a supporting standard which is sometimes referred to as a Sampson post.

ihe reference character 2, on the other hand, designates the walking beam which is rockably mounted at 3 on the top of the post. 35 In the present instance, the beam over the stufling box (not shown) is bifurcated as indicated at l, and the carrier generally designated by the reference character 5 is associated with this bifurcated end. The car rier comprises an arm 6' having a lower forked end 7, and provided between its ends with pivot pintles 8. Mounted on the upper end of the arm for oscillation. is a blocklike head 9 which is provided with a groove for reception of a grip line, (not shown).

The arm is disposed for rocking movement between the furcations of the bifurcated end of the beam and these furcations are provided in. their upper edges with seats 10 for reception of the pintles 8.

A bracket 11 is mounted adjacent the pivot 3 on the walking beam as indicated in the drawing, and a link 12 is connected with this and with the short arm of a bell crank 13, the bell crank being pivoted as at 14 on the standard 1. Thereis also a connection between the long arm of the bell crank and the lower forked end of the aforesaid arm 6 of this connection and includes links 15 and 16 adjustably connected together by a turn buckle 17.

From the foregoing description, it is ob vious that when the left hand end of the walking beam is rocked downwardly and the opposite end is moved upwardly, the bell crank 13 assumes the approximate position shown in crank 13 and in so doing it exerts a pull upon the connection between I itself and the aforesaid arm 6, thus rocking the arm to the angular position also shown in this figure. However, the grip line, which is engaged with the oscillatory block 9 still remains vertical owing to its pivotal connection with the arm 6. In other words, under the action of this device, the carrier block 9 is self-adjusting, regardless of the particular position of the walking beam.

It is believed that by considering the description in connection with the drawings, persons familiar with structures of this kind will be able to obtain a clear understanding of the same. In view of this, a more detai ed description is thought unnecessary.

I/Vhile the preferred embodiment of the invention has been shown and described, it is to be understood that minor changes coming within the field of invention claimed may be resorted to if desired.

Having thus described my invention, what I claim as new is 1. In a structure of the class described, in combination, a standard, a walking beam pivotally mounted on the upper end of the standard for rocking movement, an arm pivotally mounted at the outer end of the walking beam, grip-line carrier block pivotally mounted on the upper end of the arm, a bell crank pivotally mounted on the standard, a connection between the long arm of the bell crank and the lower end of the aforesaid arm, and an operating connection between the short arm of the bell crank and the walking beam.

2. In a structure of the class described, in combination, a standard, a walking beam pivotally mounted on said standard, an arm. pivotally supported at the outer end of said walking beam, the ends of said arm projecting above and below the beam, a grooved carrier block for a grip line pivotally mounted on the upper end of the arm, a bracket connected with said walking beam adjacent the pivotal connection with the standard, a bell crank pivotally mounted on the standard, a connection between the long arm of the bell crank and the lower 011d 10 of the aforesaid arm.

In testimony whereof I afiix my signature.

RICHARD BRANNON. 

